IDT70P248L データシートの表示（PDF） - Integrated Device Technology
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IDT70P248L Datasheet PDF : 23 Pages
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IDT70P258/248L
Low Power 1.8V 8K/4K x 16 Dual-Port Static RAM
Industrial Temperature Range
Truth Table II: Semaphore Read/Write Control(1)
Inputs
Outputs
CE
R/W
OE
UB
LB
SEM
I/O8-15
I/O0-7
Mode
H
H
L
X
X
L
DATAOUT
DATAOUT Read Data in Semaphore Flag
X
H
L
H
H
L
DATAOUT
DATAOUT Read Data in Semaphore Flag
H
↑
X
X
X
L
DATAIN
DATAIN Write DIN0 into Semaphore Flag
X
↑
X
H
H
L
DATAIN
DATAIN Write DIN0 into Semaphore Flag
L
X
X
L
X
L
____
____
Not Allowed
L
X
X
X
L
L
____
____
Not Allowed
NOTE:
1. There are eight semaphore flags written to via I/O0 and read from all of the I/O's (I/O0-I/O15). These eight semaphores are addressed by A0-A2.
5675 tbl 03
Absolute Maximum Ratings(1)
Symbol
Rating
Commercial
Unit
& Industrial
VTERM(2)
Terminal Voltage with
-0.5 to VDDMAX +0.3V(4)
V
Respect to GND
TBIAS(3)
Temperature Under Bias
-55 to +125
oC
TSTG
Storage Temperature
-65 to +150
oC
TJN
Junction Temperature
+150
oC
IOUT (for
DC Output Current
VDDQL = 3.0V)
20
mA
IOUT (for
DC Output Current
VDDQL = 1.8V)
20
mA
5675 tbl 04
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
2. VTERM must not exceed VDD + 0.3V for more than 25% of the cycle time or 10ns
maximum, and is limited to < 20mA for the period over VTERM = VDD + 0.3V.
3. Ambient Temperature under DC Bias. No AC Conditions. Chip Deselected.
4. VDDQLMAX + 0.3V for left port.
6.442
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